import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';

void main() => runApp( MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    //final wordPair =  WordPair.random();
    return  MaterialApp(
      title: 'Welcome to Flutter',
      theme:  ThemeData(
        primaryColor: Colors.black87,
      ),
      home:RandomWords(),
    );
  }
}

class RandomWords extends StatefulWidget {
  @override
  createState() =>  RandomWordsState();
}

class RandomWordsState extends State<RandomWords> {
  final _suggestions = <WordPair>[];

  final _saved = Set<WordPair>();

  final _biggerFont = const TextStyle(fontSize: 18.0);
  void _pushSaved() {
    Navigator.of(context).push(
      MaterialPageRoute(
        builder: (context) {
          final tiles = _saved.map(
                (pair) {
              return ListTile(
                title: Text(
                  pair.asPascalCase,
                  style: _biggerFont,
                ),
              );
            },
          );
          final divided = ListTile
              .divideTiles(
            context: context,
            tiles: tiles,
          )
              .toList();

          return  Scaffold(
            appBar: AppBar(
              title: Text('Saved Suggestions'),
            ),
            body: ListView(children: divided),
          );
        },
      ),
    );
  }
  @override
  Widget build(BuildContext context) {
    // final wordPair =  WordPair.random();
    // return  (Text(wordPair.asPascalCase));
    return  Scaffold (
        appBar: AppBar(
          title: Text('Startup Name Generator'),
          actions: <Widget>[
             IconButton(icon: Icon(Icons.list), onPressed: _pushSaved),
          ],
    ),
    body: _buildSuggestions(),
    );
  }
  Widget _buildSuggestions() {
    return  ListView.builder(
        padding: const EdgeInsets.all(16.0),
        itemBuilder: (context, i) {
          if (i.isOdd) return Divider();

          final index = i ~/ 2;

          if (index >= _suggestions.length) {
            _suggestions.addAll(generateWordPairs().take(10));
          }
          return _buildRow(_suggestions[index]);
        },
    );
  }
  Widget _buildRow(WordPair pair) {
    final alreadySaved = _saved.contains(pair);
    return ListTile(
      title: Text(
        pair.asPascalCase,
        style: _biggerFont,
      ),
      trailing:  Icon(
        alreadySaved ? Icons.favorite : Icons.favorite_border,
        color: alreadySaved ? Colors.blue : null,
      ),
      onTap: () {
        setState(() {
          if (alreadySaved) {
            _saved.remove(pair);
          } else {
            _saved.add(pair);
          }
        });
      },
    );
  }
}

